CPC Subgroup
H04L 61/45 Network directories; Name-to-address mapping
Full Title
Network arrangements, protocols or services for addressing or naming > Network directories; Name-to-address mapping
Filing statistics
CPC H04L 61/45 belongs to the parent subclass H04L, which recorded 1,567,994 patent applications worldwide between 2013 and 2023. Annual filings grew from 97,627 in 2013 to 139,810 in 2023 (+43%), peaking at 168,964 applications in 2020. The most active applicants in class H04 are HUAWEI TECHNOLOGIES COMPANY (101,476 applications), QUALCOMM (101,139 applications) and SAMSUNG ELECTRONICS COMPANY (96,655 applications).
Source: EPO PATSTAT, worldwide filings
11 direct subcodes
Child Classifications
Navigate with arrow keys, Enter to open
- H04L 61/4505 using standardised directories; using standardised directory access protocols
- H04L 61/4535 using an address exchange platform which sets up a session between two nodes, e.g. rendezvous servers, session initiation protocols [SIP] registrars or H.323 gatekeepers
- H04L 61/4541 Directories for service discovery
- H04L 61/4552 Lookup mechanisms between a plurality of directories; Synchronisation of directories, e.g. metadirectories
- H04L 61/4557 Directories for hybrid networks, e.g. including telephone numbers
- H04L 61/4588 containing mobile subscriber information, e.g. home subscriber server [HSS]
- H04L 61/4594 Address books, i.e. directories containing contact information about correspondents (telephone directories in user terminals H04M1/27453)
Top Applicants
Top 10 applicants by patent filingsfor class H04, 2013–2023, worldwide · Source: EPO PATSTAT
- HUAWEI TECHNOLOGIES COMPANY CN 101,476
- QUALCOMM US 101,139
- SAMSUNG ELECTRONICS COMPANY KR 96,655
- TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) SE 57,744
- LG ELECTRONICS KR 55,253
- HUAWEI TECHNOLOGIES COMPANY 54,181
- SONY CORPORATION JP 35,309
- ZTE CORPORATION CN 32,950
- INTEL CORPORATION US 27,533
- GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORPORATION CN 27,498